Note:1. How to calculate Support Max LED Strip Length? For example: Your LED Strip60LEDs/m, and each LED0.2W, then calculate max LED Strip Length: 0.2W/LED × 60LEDs/m=12W/m, 360W(this listing)÷12W/m=30m, so Support the LED Strip(60LEDs/m, 0.2W/LED)Length (Max)=30M2. This power supply unit "DOES NOT" come with installation instruction, wiring cable, on/off switch, or screws. Professional installation of qualified electrician is highly recommended.3. Supply two LED strip, indoor use only.4. Widely used in Industrial automation, LED display, communications, etc.